CN1439198A

CN1439198A - Interference detection, identification, extraction and reporting

Info

Publication number: CN1439198A
Application number: CN01809747A
Authority: CN
Inventors: C·E·贾格尔; M·N·威利茨; M·托比亚
Original assignee: ISCO International LLC
Current assignee: ISCO International LLC
Priority date: 1999-04-28
Filing date: 2001-04-06
Publication date: 2003-08-27
Anticipated expiration: 2021-04-06
Also published as: CN1265560C; US20140233418A1; US7317698B2; US20120309438A1; US8767628B2; US20150312785A1; US8948328B2; US8750259B2; US20150080042A1; US9107224B2; US9198055B2; US20140233461A1; US20140308900A1; AU2001251424A1; US20120282918A1; US8971207B2; US20150139013A1; US20120281731A1; US8724552B2; US20120322389A1

Abstract

An adaptive notch filter (ANF) module selectively filters a received wideband communication signal to eliminate narrowband interference that lies within the frequency spectrum of the wideband communication signal. To determine the presence of narrowband interference, the ANF module scans various known narrowband channels that lie within the frequency spectrum of the wideband communication signal and determines signal strengths for each of the narrowband channels. The signal strengths from the narrowband channels are compared to a threshold that is derived from the narrowband signal strengths. Narrowband channels having signal strengths that are greater than the threshold are determined to have interference.

Description

The detection, identification, extraction and the method for reporting that disturb

The cross reference of related application

The application requires the U.S. Provisional Application No.60/195 of submission on April 7th, 2000,387 rights and interests.

Technical field

The present invention is directed to communication system, especially at the technology that in wide-band communication system, detects, discerns, extracts and eliminate narrow band interference.

Background technology

As shown in Figure 1, example telecommunications system 10 comprises mobile unit 12,13, several base stations, wherein two are shown 14 and 16 in Fig. 1, and can with the switching station 18 of each base station 14,16 interface.Base station 14,16 and switching station 18 are referred to as network infrastructure.

Operating period, one of mobile unit 12,13 and base station 14,16 exchange voice data and out of Memory, each base station all is connected to conventional landline telephone net.For example, pass to the information of one of base station 14,16,, be coupled to telephone network and the phone of mobile unit 12 with landline joined, make landline telephone can receive this speech information by the base station as speech information from mobile unit 12.Otherwise, information such as speech information can be passed to one of base station 14,16 from landline telephone, then information is passed to mobile unit 12.

Mobile unit 12,13 and base station 14,16 can be with analog or digital mode exchange messages.For ease of describing, suppose that mobile unit 12 is arrowband analogue units, mobile unit 13 is the wideband digital unit, supposes that also base station 14 is the arrowband anolog base stations of communicating by letter with mobile unit 12, base station 16 is the wideband digital base stations of communicating by letter with mobile unit 13.

Analog form communications applications arrowband 30KHz channel is realized." advanced mobile phone system " is a routine analog communication system (AMPS), and mobile unit 12 is used narrow band channel and communicated by letter with base station 14.Perhaps, mobile unit 13 Applied Digital communication modes are communicated by letter with base station 16 as using code division multiple access (CDMA) or time division multiple access (TDMA).Digital communication utilizes spread spectrum technique to realize the signal that can broadcast broadband such as 1.25MHz bandwidth.

Switching station 18 is responsible for coordinating the work of base stations 14,16 usually, guarantees that mobile unit 12,13 and base station 14,16 or some other base station of scattering on the region stably communicate by letter.For example, when mobile unit 12 was roamed between the region that two base stations cover, switching station 18 can be coordinated the communicate by letter switching of this mobile unit 12 between base station 14 and another anolog base station.

The particular problem that communication system 10 can produce is: when utilizing the mobile unit 12 of narrow band channel communication or base station 14 to hinder base stations 16 to receive and handle ability from the wideband digital signal of digital mobile unit 13 separately, communication system 10 can produce a particular problem, at this moment, the narrow band signal of mobile unit 12 or base station 14 emissions can hinder the base station 16 correct abilities that receive wideband communication signal.

Summary of the invention

According to an aspect; the present invention can implement in the method that detects and eliminate the narrow band interference in the wideband communication signal; this wideband communication signal has a frequency bandwidth, is provided with narrow band channel within it, and wherein the boundary belt frequency of boundary belt is near this frequency bandwidth.This method comprise scanning at least some narrow band channel and determine threshold value measuring signal strength signal intensity wherein according to the signal strength signal intensity of some narrow band channel at least.This method also comprises scan protection band frequency measuring the boundary belt signal strength signal intensity, and when the boundary belt signal strength signal intensity surpasses this threshold value filtering boundary belt frequency.

According to second aspect; the present invention can implement in adapting to the system that detects and eliminate narrow band interference in the wideband communication signal; this wideband communication signal has a frequency bandwidth, is provided with narrow band channel in it, and the boundary belt that wherein has the boundary belt frequency is near this frequency bandwidth.This system comprises scanner and trap module, and some narrow band channel is measuring its signal strength signal intensity at least for the former scanning, and the latter receives wideband communication signal and therefrom removes narrow band interference selectively and produce the wideband communication signal of filtering.This system also comprises and is coupled to scanner and trap module to measure the controller of its signal strength signal intensity.This controller is also determined threshold value according to the signal strength signal intensity of some narrow band channel at least, and gated sweep device scan protection band frequency is to measure the boundary belt signal strength signal intensity.In addition, when the boundary belt signal strength signal intensity surpassed this threshold value, controller may command trap module is filtering boundary belt frequency selectively.

According to the 3rd aspect, the present invention can implement in the method that detects and eliminate narrow band interference in the wideband communication signal, and this wideband communication signal has a frequency bandwidth, is provided with narrow band channel in it.This method comprise scanning at least some narrow band channel determine threshold value according to the signal strength signal intensity of some narrow band channel at least, and identification signal intensity surpasses the narrow band channel of this threshold value measuring its signal strength signal intensity.This method comprises that also identification has the narrow band channel of interim interference, and rejection frequency surpasses the wideband communication signal of the narrow band channel of this threshold value corresponding to signal strength signal intensity, but not filtering is identified as the narrow band channel with interim interference.

According to the 4th aspect, the present invention can implement in adapting to the system that detects and eliminate narrow band interference in the wideband communication signal, and this wideband communication signal has a frequency bandwidth, is provided with narrow band channel in it.This system comprises scanner and trap module, and some narrow band channel is to measure its signal strength signal intensity at least in the former scanning, and the latter receives wideband communication signal and also therefrom removes narrow band interference selectively and produce the wideband communication signal of filtering.This system also comprises the controller that is coupled to scanner and trap module, and its middle controller is fit to work with scanner, determines threshold value according to the signal strength signal intensity of some narrow band channel at least.This controller also adapts to the narrow band channel that identification signal intensity surpasses this threshold value, and identification has the narrow band channel of interim interference.In addition, controller also adapts to control trap module rejection frequency corresponding to the wideband communication signal of signal strength signal intensity above the narrow band channel of discerning of this threshold value, but not filtering has the narrow band channel of interim interference.

According to the 5th aspect, the present invention can implement in the method that detects and eliminate narrow band interference in the wideband communication signal, and this wideband communication signal has a frequency bandwidth, is provided with narrow band channel in it.This method comprises by representing the order that narrow band channel can noisy probability, and scanning some narrow band channel at least and is determined threshold value according to the signal strength signal intensity of some narrow band channel at least measuring its signal strength signal intensity.In addition, this method comprises that also identification signal intensity surpasses the narrow band channel of this threshold value, and rejection frequency surpasses the wideband communication signal of the narrow band channel of discerning of this threshold value corresponding to signal strength signal intensity.

According to the 6th aspect, the present invention can implement in adapting to the system that detects and eliminate narrow band interference in the wideband communication signal, and this wideband communication signal has a frequency bandwidth, is provided with narrow band channel in it.This system comprises scanner and trap module, the former is by the order of representing the noisy probability of narrow band channel meeting, some narrow band channel is to measure its signal strength signal intensity at least to adapt to scanning, and the latter adapts to the reception wideband communication signal and therefrom removes narrow band interference selectively and produce the wideband communication signal of filtering.This system also comprises the controller that is coupled to scanner and trap module, wherein this controller is fit to work with scanner, determine threshold value according to the signal strength signal intensity of some narrow band channel at least, identification signal intensity surpasses the narrow band channel of this threshold value, and control trap module rejection frequency surpasses the wideband communication signal of the narrow band channel of discerning of this threshold value corresponding to signal strength signal intensity.

According to the 7th aspect, the present invention can implement in the method that detects and eliminate narrow band interference in the wideband communication signal, and this wideband communication signal has the frequency bandwidth that is provided with narrow band channel.This method comprise scanning at least some narrow band channel determine threshold value to measure its signal strength signal intensity according to this signal strength signal intensity, and the storage signal strength signal intensity surpasses the tabulation of the narrow band channel of this threshold value.This method also comprises the tabulation identification interference source type that surpasses the narrow band channel of this threshold value according to this signal strength signal intensity, and rejection frequency is corresponding to the wideband communication signal of signal strength signal intensity above the narrow band channel of discerning of this threshold value, the wherein interference source type of filtering to identify.

According to the 8th aspect, the present invention can implement in adapting to the system that detects and eliminate narrow band interference in the wideband communication signal, and this wideband communication signal has the frequency bandwidth that is provided with narrow band channel.This system comprises scanner and trap module, the former adapts to by the order of representing the noisy probability of narrow band channel meeting, at least some narrow band channel is to measure its signal strength signal intensity in scanning, and the latter adapts to the reception wideband communication signal and therefrom removes narrow band interference selectively and produce the wideband communication signal of filtering.In addition, this system can comprise the controller that is coupled to scanner and trap module, this controller adapts to the tabulation that the storage signal strength signal intensity surpasses the narrow band channel of threshold value, according to this table identification interference source type, and control trap module rejection frequency is corresponding to the wideband communication signal that be identified narrow band channel of signal strength signal intensity above this threshold value, and the filter that the trap module is used is based on the type of discerned interference source.

According to the 9th aspect, the present invention can implement in the method that detects and eliminate narrow band interference in the wideband communication signal, and this wideband communication signal has the frequency bandwidth that is provided with narrow band channel.This method comprise scanning at least some narrow band channel determine threshold value to measure its signal strength signal intensity according to this signal strength signal intensity, and the storage signal strength signal intensity surpasses the tabulation of the narrow band channel of this threshold value.This method also comprises the narrow band channel given filter of discerning that some signal strength signal intensity is at least surpassed this threshold value, and signal strength signal intensity is exported to network manager above the tabulation of the narrow band channel of this threshold value.

Those skilled in the art has read with reference to after the description of accompanying drawing to preferred embodiment, will understand all characteristics of the present invention, below accompanying drawing is done a summary.

Description of drawings

Fig. 1 example illustrates a communication system;

Fig. 2 example illustrates the base station of Fig. 1;

Fig. 3 example illustrates the glitch-free frequency spectrum of broadband signal;

Fig. 4 example illustrates the frequency spectrum of broadband signal when three kinds of narrow band interference are arranged;

Fig. 5 example illustrates the frequency spectrum of broadband signal after removing three kinds of narrow band interference;

Fig. 6 example illustrates an embodiment of adaptive notch filter among Fig. 2 (ANF);

Fig. 7 example illustrates second embodiment of ANF module among Fig. 2;

Fig. 8 example illustrates the trap module among Fig. 7;

Fig. 9 example illustrates second embodiment of notch filter among Fig. 8;

Figure 10 is the signal main program flow chart that Fig. 7 microcontroller is carried out;

Figure 11 is the schematic flow diagram of setting up the default value program that Fig. 7 microcontroller is carried out;

Figure 12 is the schematic flow diagram of built-in testing equipment (BITE) test program of Fig. 7 microcontroller execution;

Figure 13 is the schematic flow diagram that the signal processing of Fig. 7 microcontroller execution is disturbed recognizer;

Figure 14 is the schematic flow diagram of the interference extraction procedure of Fig. 7 microcontroller execution;

Figure 15 is the schematic flow diagram of the fault condition audit program of Fig. 7 microcontroller execution;

Figure 16 A and 16B form operation, warning and the metering (OA﹠amp of Fig. 7; M) example flow diagram of the main program of processor execution;

Figure 17 is the OA﹠amp of Fig. 7; The schematic flow diagram of the preparation responder that the M processor is carried out;

Figure 18 is the OA﹠amp of Fig. 7; The schematic flow diagram of the data buffer interrupt function that the M processor is carried out.

Embodiment

System and/or method that a kind of detection, identification, extraction and report interference will be described in detail in detail below can be applicable to communication system.Especially this system or method can be used to protect or report the narrow band interference of existence in wide-band communication system, this interference produces injurious effects to the performance of wide-band communication system.

As shown in Figure 2, in Fig. 1, be described as the signal RX path of reception, comprise the antenna 20 that signal is provided to low noise amplifier (LNA) 22 from the base station 16 of the narrow band interference of mobile unit 12.The output of LNA22 is coupled to beam splitter 24, and the latter is divided into some different paths to the signal from LNA, and wherein a paths is coupled to adaptive notch filter (ANF) module 26, and another paths is coupled to narrow-band receiver 28.The output of ANF module 26 is coupled to broadband receiver 30, and the latter for example can implement by cdma receiver or arbitrary other suitable broadband receiver.Narrow-band receiver 28 can be by implementing in 15KHz bandwidth receiver or arbitrary other suitable narrow-band receiver.Though Fig. 2 only illustrates a signal path, those skilled in the art is readily understood that the sort signal path only is an example, and in fact, the base station can comprise two or many these class signal paths, is used to handle its main signal of receiving and multiple signal.

The output of arrowband and broadband receiver 28 and 30 is coupled to other system in the base station 16, and this type systematic can be carried out the function of speech and/or data processing, call treatment or arbitrary other expectation.In addition, ANF module 26 also is communicatively coupled to report and control device by internet, telephone wire or arbitrary other appropriate media, and the latter is by base station 16 remote controls.In some net, report and control device can pool together with switching station 18.Narrow-band receiver 28 is communicatively coupled to switching station 18 and the instruction that the latter sends is responded.

Except ANF module 26, each element 20-30 of base station 16 shown in Figure 2 can find in conventional broadband cellular network base station, its details are familiar with by those skilled in the art, they also know, Fig. 2 does not illustrate each system or the subsystem of base station 16, but describes system related to the present invention and subsystem emphatically.Particularly yes understand that although not shown among Fig. 2, base station 16 comprises emission system or subsystem.

16 operating periods of base station, antenna 20 receives the broadband signal that mobile units 13 are broadcast, and sort signal is coupled to LNA22, and the latter amplifies the signal of receiving, again amplifying signal is coupled to beam splitter 24.Beam splitter 24 divisions are placed identical amplifying signal from the amplifying signal of LNA22 on its every output line.ANF module 26 receives the signal from beam splitter 24, in case of necessity broadband signal is done filtering, removing any unwanted narrow band interference, and the broadband signal of filtering is coupled to broadband receiver 30.

Broadband signal frequency spectrum 40 shown in Fig. 3 can be received by antenna 20, through LNA22 and beam splitter 24 amplify with beam splitting after, be coupled to ANF module 26.If the broadband signal that antenna 20 receives has the frequency spectrum 40 of Fig. 3, ANF module 26 will directly be coupled to broadband receiver 30 by ANF module 26 with this broadband signal not to broadband signal filtering.

Yet, as previously mentioned, the frequency spectrum 42 of Fig. 4 is launched and may be had by this broadband signal that antenna 20 receives to mobile unit 13, this frequency spectrum 42 not only comprises the broadband signal from the similar Fig. 3 intermediate frequency spectrum 40 of having of mobile unit 13, also comprise three narrow band interference shown in Figure 4 44,46,48, one of them disturbs from mobile unit 12.If the broadband signal that frequency spectrum 42 comprises narrow band interference 44,46,48 is by antenna 20 receptions, amplification, beam splitting and offer ANF module 26, then the latter will produce filtered frequency spectrum 50 shown in Figure 5 to frequency spectrum 42 filtering.

Filtered frequency spectrum 50 is removed narrow band interference 44,46,48, and frequency spectrum 50 utmost points that stay are similar to the frequency spectrum 40 that does not contain any interference.Then, filtered broadband signal is coupled to broadband receiver 30 by ANF module 26, makes filtered broadband signal spectrum 50 can do demodulation.Although some broadband signal is removed when 26 filtering of ANF module, the broadband signal that keeps is enough to allow broadband receiver 30 recover the information that mobile unit is broadcast.Therefore, generally speaking, ANF module 26 is therefrom removed narrow band interference selectively broadband signal filtering.Below in conjunction with Fig. 6-17 in detail ANF module 26 and work thereof are described in detail.

Generally speaking, the signal spectrum that ANF module 60 scanning beam splitters 24 embodiment illustrated in fig. 6 provide is sought narrow band interference wherein.This scanning by scanning broadband signal bandwidth memory various known narrow band channel realize.For example ANF module 60 can scan the various ANPS channels that are positioned at the broadband signal bandwidth, perhaps scans all frequency spectrums that this broadband signal covers.In any case, when detecting narrow band interference in broadband signal, ANF module 60 just moves into this narrow band interference the trap district of notch filter, and this narrow band interference is removed in broadband signal filtering.

Specifically as shown in Figure 6, signal from beam splitter 24 is coupled to first frequency mixer 62, the latter receives the additional input from voltage controlled oscillator (VCO) 64, will from the signal of beam splitter 26 with do mixing from the signal of VCO64, be offset signal spectrum thus, and the frequency spectrum of the part skew that is positioned at intermediate frequency (IF) put into the trap frequency of notch filter 66 from beam splitter 24.Therefore, trap frequency places the notch filter 66 of this IF to remove the component that frequency offset signals is positioned at IF.

The filtering signal that obtains is coupled to second frequency mixer 68 by notch filter 66, the latter is also driven by VCO64, it with notch filter output with do mixing from the signal of VCO64, the filtering signal frequency spectrum is retracted the origin-location that signal had from beam splitter 24.The output of second frequency mixer 68 is coupled to band pass filter 70, removes any unwanted image frequency that second frequency filter 68 produces.

In the system of Fig. 6, first frequency mixer 62 is mixed to IF to the narrow band interference that occurs in the broadband signal, i.e. the trap frequency of notch filter 66, thereby removed by notch filter 66.After notch filter 66 was removed narrow band interference, except the component of removing this narrow band interference, second frequency mixer 68 returned to its original frequency location with this signal.First frequency mixer 62, VCO64, notch filter 66, second frequency mixer 68 and band pass filter can be referred to as " shift frequency filter up and down " or " going up the shift frequency filter down ".

Signal from beam splitter 24 also is coupled to by-pass switch 72, thereby if in broadband signal, can't check narrow band interference from beam splitter 24, can make by-pass switch 72 bypass notch filters 66 and frequency mixer 62,68, the signal from beam splitter 24 is directly passed to broadband receiver 30.Perhaps, if detected narrow band interference,, force signal to pass through notch filter 66 from beam splitter 24 with regard to bypass switch opens 72.

For the narrow band interference that detects existence and carry out frequency scanning, be provided with some parts.Discriminator 74 receives the output signal from first frequency mixer 62, utilize be tuned to the received signal volume indicator (RSSI) of IF detect the IF signal strength signal intensity.The RSSI output of discriminator 74 is coupled to comparator 76, and the latter is receive threshold voltage on circuit 78 also.When pressing above the threshold on the circuit 78 from the RSSI signal of discriminator 74, comparator 76 points out on the trap frequency IF of notch filter 66 narrow band interference is arranged.When detecting narrow band interference, stop the scan operation of VCO64, make notch filter 66 can remove this IF and disturb.

For the scan operation to VCO64 is worked, the output of comparator 76 is coupled to adopt protects circuit 80, this circuit receives the input from voltage scanning generator 82.Generally can't check when disturbing at comparator 76, voltage scanning generator 82 output just protect circuit 80 and be added to adder 84 by adopting, the latter also receives the input from the low pass filter 86 that is coupled to discriminator 74 outputs.Adder 84 produces the signal that drives VCO64 with closed-loop fashion.When voltage scanning generator 82 scanned its output voltage by the time, the output of adder 84 also scanned, and made the frequency output scanning in time of VCO64.The scanning output of VCO64 scans signal from beam splitter 24 with discriminator 74 and comparator 76 to interference.As long as the no narrow band interference of comparator 76 indications, switch 72 just remains closed, because do not need the signal of filtering from beam splitter 24.

Yet, when comparator 76 detects narrow band interference in the signal from beam splitter 24 (when RSSI surpasses voltage on the circuit 78), adopt and protect the voltage level that circuit 80 is just sampled to the output sampling and the maintenance of voltage scanning generator 82, provide fixed voltage to adder 84 thus, the latter then provides fixedly output voltage to VCO64.Since provide fixed voltage to VCO64, so the frequency of VCO64 output is constant, and no longer scans the signal from beam splitter 24, but frequency shift (FS), make narrow band interference move on to the trap frequency IF of notch filter 66.In addition, when comparator 76 had been pointed out narrow band interference, switch 72 just disconnected, and will have only path by frequency mixer 62,68 and notch filter 66 with the path from the signal of beam splitter 24.

Threshold on the circuit 78 press can manual tuning or the signal strength signal intensity by certain reception of filtering produce.No matter be which kind of method, during voltage on circuit 78 is set, all will make comparator 76 when having only the broadband signal of signal as shown in Figure 3, not indicate interference, and only when the signal of narrow band interference is arranged, just indicate interference.For example, the frequency spectrum 42 of Fig. 4 illustrates three narrow band interference 44,46,48, but 76 need of comparator one of them disturb and indicated narrow band interference.Obviously, the embodiment of Fig. 6 can only select in broadband signal and the single narrow band interference of filtering.

As shown in Figure 7, the ANF module 100 of second embodiment of the some narrow band interference of energy filtering generally comprises scanner 102, A/D converter (A/D) 104, microcontroller 106, operation/warning/metering (OA﹠amp; M) processor 108 and some trap modules (wherein two are designated as 110 and 112 in Fig. 7).Microcontroller 106 and OA﹠amp; M processor 108 can be respectively implemented in the 80386 type processors that the PIC16C77-20P type microcontroller that Microchip Technology company makes and Intel Company make.Though here their diagrams be described as independent device and carry out independently software instruction, it will be apparent to one skilled in the art that can be microcontroller 106 and OA﹠amp; The function of M processor 108 is merged into single processing unit.

In addition, second embodiment of ANF module 100 can comprise built-in testing equipment (BITE) module 114 and by-pass switch 116, and the latter can be embedded in the AS239-12 GaAs single-pole double-throw switch (SPDT) that Hittite sells and implement.Microcontroller 106 and OA﹠amp; M processor 108 can be coupled respectively to

external memorizer

118 and 120.

The scanner 102 that comprises frequency mixer 130, discriminator 132 and local oscillator 134 able to programme, common and A/D104 and microcontroller 106 generation mutual effects are so that the narrow band interference that exists to be provided in the signal that provides at beam splitter 24.Frequency mixer 130 and local oscillator able to programme 134 can be implemented in the AD9831 type Direct Digital synthesizer of M/A-Com sale MD-54-0005 type frequency mixer and the manufacturing of Analog Devices company respectively.In addition, A/D104 can be completely integrated in the microcontroller 106, or a kind of self-contained unit of coupling with it.

Be described in further detail below, in case detect narrow band interference in the signal from beam splitter 24, microcontroller 106 is just removed the narrow band interference that detects by universal serial bus 136 control trap modules 110,112.As shown in Figure 7, though second embodiment of ANF module 100 comprises two trap modules 110,112, additional trap module can be set therein, the Signal Degrade that quantity is caused by each trap module only limits.Because of being provided with a plurality of trap modules, so can be from from a plurality of narrow band interference of removal in the broadband signal of beam splitter 24.For example, if 3 trap modules are set, then ANF module 110 can be handled the broadband signal with frequency spectrum 42 shown in Figure 4, produces the broadband signal with filtering of frequency spectrum 50 shown in Figure 5.

The function of scanner 102 is as follows.To be coupled to frequency mixer 130 from the signal of beam splitter 24, the latter also receives the input from local oscillator 134 able to programme.Frequency mixer 130 will be mixed down to IF from the signal of beam splitter 24, and the rssi measurement value that is coupled to A/D104 is analyzed and produced to this frequency through discriminator 132, and A/D104 can be by the digital signal of microcontroller 106 processing this RSSI signal from analog conversion of signals one-tenth.Microcontroller 106 is made comparisons output and its appropriate threshold of before having determined of A/D104.Microcontroller 106 is determined the details description more in the back of appropriate threshold.If microcontroller 106 is determined to exceed this threshold value from the output (representing RSSI) of A/D104, just specify one of trap module 110,112 to exceed the signal of the IF filtering of threshold value from beam splitter 24 with RSSI.

Microcontroller 106 is also to local oscillator able to programme 134 programmings, makes frequency mixer 130 move on to the IF that discriminator 132 is handled from the each several part frequency spectrum of the signal of beam splitter 24.For example, if there are 59 narrow band channels to be positioned at the frequency band of specific broad-band channel, microcontroller 106 will be programmed continuously to local oscillator 134 able to programme, make frequency mixer 130 be mixed down into IF to each bar of 59 channels continuously, thereby discriminator 132 can produce the rssi measurement value to every channel.Correspondingly, microcontroller 106 usefulness local oscillator 134 able to programme, frequency mixer 130 and discriminator 132 are analyzed the signal strength signal intensity of each bar that is positioned at 60 narrow band channels of broadband signal frequency band.Be positioned at every channel of broadband signal frequency band by analysis, microcontroller 106 just can be determined appropriate threshold, and whether judgement has narrow band interference in one or more narrow band channel.

After having identified narrow band interference, just 110,112 programmings injure maximum interference to remove to microcontroller 106 to the trap module immediately, as the strongest interference.Will describe in detail below, microcontroller 106 also can store the tabulation of interference channel and various other parameters, and this tabulation can be passed through OA﹠amp; M processor 108 is passed to report and control device or base station, is used for system diagnostics.

Diagnostic purpose can include but not limited to control narrow-band receiver 28 obtaining the customizing messages of relevant interference source, and by getting in touch to weaken this interference source with its base station.For example, report can be determined the interference source attributes with narrow-band receiver 28 with control device, and such as belonging to mobile unit, way is its electronic serial number (ESN) when intercepting and capturing this mobile unit launching information on narrow band channel.Known the attribute of interference source, report can be got in touch with the infrastructure with this mobile unit communication with control device, require it to change the tranmitting frequency (being the frequency of the narrow band channel launched of mobile unit) of this mobile unit, or require infrastructure to tell fully and disturb communicating by letter of mobile unit.

In addition, diagnostic purpose also comprises the telephone number of determining to attempt to get in touch or handle the mobile unit of calling with narrow-band receiver 28.For example, report and control device can determine that this mobile unit users are dialing 911 or other emergency numbers with narrow-band receiver 28, thereby decision is with narrow-band receiver 28 is handled urgent call by telephone network is passed in its output.

Fig. 8 shows in detail trap module 110, should be appreciated that, any other trap module that ANF module 100 is used is identical with trap module 110 basically.Trap module 110 generally is a shift frequency or go up the shift frequency filter down up and down, and its operation principle is similar to the ANF module of describing in conjunction with Fig. 6 60.Particularly, trap module 110 comprises first and second frequency mixers 150,152, and each frequency mixer receives the input signal from phase-locked loop (PLL) 154, and this phase-locked loop 154 is by universal serial bus 136 interfaces of logic circuit block 156 with microcontroller 106.Notch filter piece 158 describes below its details between frequency mixer 150 and 152.In fact, frequency mixer 150,152 can be implemented in the MD54-0005 type frequency mixer that M/A-Com sells, and PLL154 can implement in the LMX2316TM type frequency synthesizer that National semiconductor company sells.

When 100 work of ANF module, microcontroller 106 control PLL154 produce output signal, make first frequency mixer 150 that the signal spectrum from beam splitter 24 is moved to IF, and this is the trap frequency of notch filter piece 158.Or in the occasion of trap module cascade, the trap module can receive its input and do not receive from beam splitter 24 from another trap module.The output of PLL154 also can be coupled to second frequency mixer, after notch filter piece 158 is removed narrow band interference, will be moved back into its origin-location from the signal spectrum of notch filter piece 158, as what receive from beam splitter 24.The output of second frequency mixer 152 also is coupled to filter 160, removes any undesirable image frequency that is produced by second frequency mixer 152.The output of filter 160 can be coupled to other trap module (as trap module 112), if without other trap module, can couple directly to broadband receiver 30.

In addition, trap module 110 comprises by-pass switch 164, when not preparing filtering narrow band interference or trap module 110 and lost efficacy, is used for bypass trap module 110.For example, when can't check will be with the interference of trap module 110 filterings the time, microcontroller 106 is with regard to closes bypass switch 164.Otherwise, when detecting interference and prepare with this interference of trap module 110 filterings, 106 bypass switch opens 164 of microcontroller.

As shown in Figure 8, notch filter piece 158 comprises filter 165, can be for example-suppress the filter that bandwidth reaches about 15KHz during 40dB.Its inhibition zone can be fixed in for example centre frequency of 150MHz, or any other suitable frequency at the IF place of frequency mixer 150.

As shown in Figure 9, though illustrating the notch filter piece 166 of single filter 165, the second embodiment, 158 of the notch filter pieces of Fig. 8 can comprise switch 170 and a plurality of filter 172-1780.In this configuration, each filter 172-178 is different in the inhibition bandwidth of-40dB, and as shown in Figure 9, the inhibition bandwidth of filter 172-178 is 15KHz-120KHz.Use the filter of various inhibition bandwidth, can allow ANF module 100 select to have the filter that the optimization in filtering interfering source best suppresses bandwidth.

When the notch filter piece 166 of second embodiment was worked, microcontroller 106 control switchs 170 were passing to one of filter 172-178 from the output signal of first frequency mixer 150.Microcontroller 106 is selected the filter 172-178 of the interference that the most suitable filtering of contained trap switchers detected by microcontroller 106 by switch 170.For example, if controller 106 is judged on some side channels interference is arranged, it just is enough to the filter 172-178 of all these classes interference of filtering with notch-width, rather than with the interference on single each independent channel of filter filtering.In addition, when the narrow band channel of no narrow band interference separates two noisy narrow band channels, can use the filter in single broadband.To do filtering to glitch-free narrow band channel though use single wide-bandwidth filter, can ignore the broadband signal information of losing.

After the details of having described aspect this system hardware, now the software aspect of attentiveness steering.Certainly, it will be apparent to those skilled in the art that to be easy to software function is made hardware unit, as application-specific integrated circuit (ASIC) (ASIC).Thereby though following description belongs to software, this description is an example, should not think restriction.

Therefore, some pieces of comprising of Figure 10-15 are represented software and hardware function or program.If these pieces represents software function, just can high-level language such as C language or any other suitable high-level language, the instruction compiled program of all functions of enforcement, and weave into machine readable format.Perhaps, all instruction is represented in available assembler code or any other suitable language establishment.This class instruction can be stored in the microcontroller 106 or in the external memory storage 118, therefrom call execution by microcontroller 106.

As shown in figure 10, main program 200 comprises some piece or programs of describing at the high level relevant with Figure 10, and Figure 11-15 is described further.Main program 200 begins to carry out at piece 202, and microcontroller 102 is set up default value and prepared to carry out the function of ANF module 100.After setting up the default value function and finishing, piece 204 is carried out in control, and ANF module 100 is done built-in testing equipment (BITE) test.

After the BITE test, control enters 206 from piece 204, carries out signal processing and disturbs identification.After piece 206 had been discerned interference, control entered piece 208, extracted the interference of identification from the broadband signal that ANF module 100 is received.

After piece 208 extracted interference, control entered piece 210, does the fault condition inspection, by checking the overall failure of ANF module 100, guaranteed that this module 100 is in operate as normal.

After fault condition was checked, control entered piece 210-212, did the interfering data preparation, comprised that the information that certain piece 202-210 is produced passes to OA﹠amp from microcontroller 106; M108.After the interfering data preparation was finished, main program 200 just finished its execution.Microcontroller 106 is carried out main program 200 with for example time interval every 20ms.

As shown in figure 11, set up default value program 202 and begin to carry out at piece 22, microcontroller 106 tuning local oscillators 134 able to programme, scanning frequency is appointed as the interference on first channel of F1.As shown in figure 11, F1 can be 836.52MHz.Perhaps, it will be apparent to those skilled in the art that the ANF module 100 first tuning channels can be any suitable frequency that is positioned at the frequency band or the boundary belt of broad-band channel.

After microcontroller 106 built up the interference of scanning on the first frequency, control entered piece 222 from piece 220, set up acquiescence noise threshold value, was used for measuring the narrow band interference that the broadband signal that is received from Fig. 2 beam splitter 24 exists.How to produce appropriate threshold although the description of back will describe in detail, piece 222 is only set up initial threshold to measuring the narrow band interference that exists.

After piece 222 was provided with default threshold, control entered piece 224, and microcontroller 106 reads various inputs, sets up serial communication with trap module 110,112 and other serial communication apparatus, and and OA﹠amp; M processor 108 is set up communication.After piece 224 is finished execution, set up default value program 202 and make control return main program and execution block 204.

Figure 12 shows in detail BITE test program 204, and it begins to carry out after program 202 finishes.Particularly, BITE test program 204 begins to carry out at piece 240, and microcontroller 106 makes them be in bypass mode by the by-pass switch 190 of closed trap module 110,112.In bypass after the trap module 110,112,106 pairs of BITE modules of microcontroller 114 programming produces the interference that is used to test trap module 110,112 validity for diagnosis.After 110,112 bypasses of trap module and 114 startups of BITE module, control enters 242 from piece 240.

At piece 242, microcontroller 106 reads the interference source signal level by A/D104 at trap module 112 outputs.Because trap module 110,112 is by piece 240 bypasses, the signal level of trap module 112 outputs should comprise the interference that BITE module 114 produces.

After piece 242 had been read the interference source signal level, piece 244 judged whether this interference source level of reading is suitable.Because trap module 110,112 has placed bypass mode at piece 240, so microcontroller 106 is hopeful to see interference source at trap module 112 outputs.If can not accept (promptly too high or too low) at the interference source level that trap module 112 outputs detect, control enters piece 246 from piece 244, and announcement system is made mistakes.Announcement system is made mistakes and is comprised that microcontroller 106 is to OA﹠amp; M processor 108 reporting systems are made mistakes.Then, OA﹠amp; M processor 108 is made mistakes to report and control device reporting system.In addition, announcement system is made mistakes and is also comprised and will the external memory storage 118 that the fact that system makes mistakes writes microcontroller 106 occur.

Otherwise, if piece 244 concludes that this interference source level is suitable, then to control from piece 244 and enter piece 248, microcontroller 106 is used one or more trap modules 110,112.Used trap module 110,112 backs (i.e. not bypass) at piece 248, control enters piece 250, reads the signal level of trap module 112 outputs.Because BITE module 114 produces interference with the frequency of the notch filter that piece 248 is used, so expectation trap module 110,112 is removed this interference.

Behind piece 250 read output signal level, control enters piece 252, and judgement has noiseless.If interference is arranged, control just enters piece 246 from piece 252, because one or more trap modules 110,112 are because of suppressing the interference cisco unity malfunction that BITE module 114 produces, so announcement system is made mistakes.Otherwise, if can't check interference at piece 252, ANF module 100 operate as normal, thereby can't check interference at piece 254, ANF module 100 operate as normal, thereby be placed in normal mode of operation at piece 254.After having carried out

piece

254 or 246, BITE test program 204 makes control return main program 200, beginning execution block 206.

As shown in figure 13, begin to carry out signal processing and disturb recognizer 206 at piece 270.At piece 270, microcontroller 106 control local oscillator 134 able to programme makes it read signal strength values to the channel of every expectation by discriminator 132 and A/D104.Particularly, microcontroller 106 control local oscillator 134 able to programme continuously be tuned to some known channel, tunning effect moves to IF with every known channel, makes discriminator 132 can make RSSI read the signal strength signal intensity of each channel.If the probability that other channel strip of some channel ratio disturbs is higher, can chooses wantonly and at first scan the higher channel of probability.According to the interfering data that always jamming pattern or ANF module 100 are observed, can determine the channel that probability of interference is higher.

At piece 270, microcontroller 106 is also controlled local oscillator 134 able to programme, makes the frequency displacement of boundary belt part to IF, allows discriminator 132 produce the rssi measurement value to this boundary belt.Because outside the filter response of boundary belt in placing broadband receiver 30, so piece 270 will be compensated the boundary belt signal strength readings by the amount of broadband receiver 30 inner receiver filter attenuations by this class reading value being reduced this boundary belt.The reason of compensation is that ANF module 100 is relevant to the illeffects of broadband receiver 30 with narrow band signal.Correspondingly, the signal of frequency in broadband receiver 30 filter passbands do not require compensation, drops in the boundary belt and will then be required compensation by the signal of the receiving filter filtering of broadband receiver 30.The Frequency Response of boundary belt compensation is the same with the broadband receiver filter response basically, and for example, with a specific frequency attenuation 10dB, then boundary belt will be attenuated 10dB at the reading of this characteristic frequency as if the broadband receiver filter.

After piece 270 finished, control entered piece 272, selects the highest channel of some signal levels.Usually, the number of channel selected of piece 272 is directly corresponding to the quantity of certain specific ANF module 100 applied trap module 110,112.Behind the highest channel of piece 272 select-out signal level, control enters piece 274 from piece 272.

At piece 274, the expectation channel calculation average signal strength value that 106 pairs of pieces 270 of microcontroller read is determined appropriate threshold, but the mean value that calculates is not considered the highest channel of signal level that piece 272 is selected.Perhaps, can comprise that the signal level that piece 272 is selected comes calculating mean value.The mean value that piece 274 calculates will obtain deviation compensation, and be used for the expectation channel that decision block 270 reads and have or not narrow band interference.

After piece 274 was finished execution, control entered piece 276, and signal strength values and this appropriate threshold of piece 272 selected channels are made comparisons, and this threshold value is average threshold and the deviation sum that piece 274 calculates.If the signal strength signal intensity of the channel that piece 272 is selected surpasses this appropriate threshold, control enters piece 278.

According to the channel that surpasses this appropriate threshold, the noisy channel of piece 278 indications.For example will write external memory storage 118, pass to OA﹠amp from the information of microcontroller 106; M processor 108 is made such indication.After piece 278 had been pointed out this interference source, control entered piece 280.In addition, if piece 272 can not select signal strength signal intensity to surpass the channel of appropriate threshold, control just enters piece 280 from piece 276.

At piece 280, microcontroller 106 upgrades interfering data.Point out the channel of interference source.Particularly, at each frame (as 20ms), microcontroller 106 detects interference source by power level (RSSI) on more some channels and threshold level.When detecting interference source, in the whole time that this interference source is classified as interference source, (promptly drop to and be lower than this threshold value) till one period that is enough to by the following test of stalling for time, the data of collecting this interference source up to the RSSI of this channel level.All these information are all write OA﹠amp; The memory (as memory 118 or 120) of M processor 108 visits.As described below, OA﹠amp; M processor 108 is handled this information and is produced jamming report.

In addition, piece 280 reads and can be received from OA﹠amp; The input instruction of M processor 108, this class instruction is generally used for carrying out the configuration and the measurement of ANF module 100.Particularly, the instruction of this class can be to make ANF module 100 be in the instruction of various patterns, the test pattern of normal mode, application or excitation built-in testing equipment for example, or the bypass mode of bypass ANF module 100 fully.In addition, also available commands changes the evident characteristics of ANF module 100, and as the identification number of available commands change ANF module 100, identification is used for the device type of ANF module 100, discern the region location of ANF module 100, the time and date of local clocks in the ANF module 100 perhaps is set.Also have, can utilize and instruct for example additions and deletions or change, control the operation of ANF module 100 with 100 scannings of ANF module or the artificial narrow band channel that signal is classified as the threshold value of interference source of changing.Moreover available commands changes following attack time and stalls for time.In addition, also can provide the instruction of forbidding ANF module 100.

After having carried out piece 280, signal processing returns control to main program 200 with disturbing recognizer 260, continues to carry out at piece 208.

As shown in figure 14, begin to carry out interference extraction procedure 208, will have the duration of interference source and the reference time that is called " allowing the duration " (being also referred to as " attack time ") to make comparisons at piece 290.If interference source occurs longlyer than attack time, control just enters piece 292; Otherwise if interference source occurs unlike allowing longer duration, control then enters piece 296, describes in detail more below.Piece 290 plays slow effect basically, prevents from filter is distributed to the interim interference source that this class interference source just occurs.The permission time is generally 20 milliseconds of magnitudes, near the frame rate of cdma communication system.It will be apparent to those skilled in the art that frame rate is exactly the speed of base station and mobile unit swap data, for example, if frame rate is 20ms, mobile unit will receive a data burst section every 20ms from the base station.Piece 90 is admitted the mobile unit that is in initial power up.It will be apparent to one skilled in the art that mobile unit initially powers on according to the transmitting power near its transmit power limit.Treat this mobile unit that initially powers on and base station set up communicate by letter after, the base station can order this mobile unit to reduce its transmitting power.Because mobile unit reduced its transmitting power, it just no longer is the interference source that has the base station of ANF module.Correspondingly, piece 290 can prevent that ANF module 100 from distributing to the interference source that oneself disappears at short notice to trap module 100,112.

At piece 292, microcontroller 106 judges whether the current trap module 110,112 that is not used for the filtering interfering source, if ready-made trap module is arranged, control just enters piece 294 from piece 292, and excitation and tuning this trap module filtering appear at from the interference source in the broadband signal of beam splitter 24.After having carried out piece 294, control enters following piece 296.

Yet if piece 292 is concluded no ready-made trap module, control enters piece 298 from piece 292, judges whether the interference source that occurs is stronger than the interference source of present distribution trap module.Piece 298 is generally pressed relative importance value and is handled trap module, the at first the strongest interference source of filtered signal level.Do not compare it and distribute other interference source of trap module stronger if piece 298 is concluded the interference source of this appearance, control enters piece 296 from piece 298.

Perhaps, distributed certain interference source of trap module stronger, then controlled from piece 298 and enter piece 300 if the interference source that occurs is compared it.Piece 300 judges that whether the more weak interference source of the interference source of ratio appearance is by the test of stalling for time.The test of stalling for time is used to prevent that ANF module 100 from cancelling the trap module 110,112 of this interference source when interference source is in interim decline state, for example, if certain mobile unit is producing interference and is distributing trap module 110,112 with this interference of filtering, when this mobile unit enters the decline state and during interference level step-down that ANF module 100 detects, ANF module 100 is not cancelled the trap module that is used for filtering decline interference, is being called in the Fabian time up to this interference no longer to occur.Usually, stalling for time is a kind of slow effect, prevents that the trap module from promptly withdrawing just interim decline and the interference source that can return later.Therefore, if this interference source that is weaker than current interference source has passed through stall for time, control just enters piece 302; Otherwise not through stalling for time, 300 of pieces controllably enter piece 296 as if this interference source that is weaker than current interference source.

At piece 302, microcontroller 106 does not encourage the trap module of filtering than the weak jamming source, and it is redistributed to stronger interference source.After piece 302 was redistributed the trap module, control entered piece 296.

At piece 296, microcontroller 106 rearranges interference source from minimum to maximum level, and the trap module is distributed to the interference source of maximum level.As piece 298, piece 296 is handled by relative importance value, guarantees with the strongest interference source of trap module filtering.In addition, piece 296 is analyzed the jamming pattern that ANF module 100 detects, and distributes the filter 172-178 filtering interfering source of various notch-width.For example, bandwidth is the interference of 50KHz if ANF module 100 detects sum total on continuous channel, just with this interference of 50KHz filter 176 filterings in the notch filter 158, and filter that need not 4 15KHz.This technology extremely is convenient to the additional interference source of trap module 110,112 filterings.

After executing piece 296, control enters piece 304, and all channels and disturbance state thereof are tabulated, and deliver to can be by OA﹠amp; The memory (as memory 118 or 120) of M processor 108 visits upgrades interfering data.After executing piece 304, disturb extraction procedure 208 to make control return primary module 200, continue execution block 210.

At piece 210, as shown in figure 15, microcontroller 106 judges whether ANF module 100 has catastrophe failure.For example, this determining method can judge whether the voltage of the pressurizer output of ANF module 100 is suitable output voltage; Perhaps, check that can each trap module 110,112 work, judge catastrophe failure with this.If each trap module can not be worked, then ANF module 100 has catastrophe failure.In any case if catastrophe failure occurs, control just enters piece 322 from piece 320, microcontroller 106 makes all trap modules 110,112 of by-pass switch 116 bypass ANF modules 100 of Fig. 7 at this moment, and beam splitter 24 directly is connected to broadband receiver 30.After having carried out piece 322, or if block 320 judges and catastrophe failure do not occur that main program 200 is just got back in control, continues execution block 212.At piece 212, will write

memory

118 or 120 interfering datas are passed to OA﹠amp; M processor 108.

After having described the software function of microcontroller 106 execution, turn to the OA﹠amp of Fig. 7 now; M processor 108.If all of Figure 16 is represented software function, then implement available certain high-level language of instruction of all functions and write as program, as C or any other suitable high-level language, and can be assembled into machine readable format.Perhaps, available assembler code or any other suitable language compilation are represented all instruction.This class instruction can be stored in OA﹠amp; In the M processor 108 or in the external memory storage 120, OA﹠amp; M controller 108 can therefrom access execution.

Particularly, shown in Figure 16 A and 16B (being referred to as Figure 16 here), OA﹠amp; The main program 340 that M processor 108 is carried out can begin to carry out OA﹠amp at piece 342; M processor 108 is by setting up communication, check alarm condition and carrying out general house-keeping task and self-initialization.At piece 342, OA﹠amp; After 108 initialization of M processor, control enters piece 344.

At piece 344, OA﹠amp; 108 judgements of M processor have or not new data from OA﹠amp; Read in the M buffer (not shown).If piece 344 concludes that the new data that will read is arranged, control enters piece 346, judges whether new data is effective, if effectively, control enters piece 348 from piece 346, from OA﹠amp; M buffer sense data.Otherwise,, then control from piece 346 and enter piece 350, OA﹠amp if piece 346 concludes that new data is invalid; The M buffer resets.After having carried out piece 348 or 350, control enters piece 352, describes in detail below.

Get back to piece 344, will read if piece 344 is concluded no new data, control enters piece 360, calculates the power level of each channel of ANF module 1 00 scannings.OA﹠amp; M processor 108 can be at piece 360 rated output level, and the data that produce because of the microcontroller of ANF module 100 106 each bar channel of scanning are stored in OA﹠amp; In the readable buffer of M processor 108.

After piece 360 was calculated power level, control entered piece 362, judged whether the power level of calculating exceeds predetermined threshold, if exceed, control enters 364 from piece 362, the duration of tracking source before entering piece 366.Otherwise if piece 362 judges that the power level of calculating does not exceed threshold value, control directly enters 366 from piece 362.

Piece 366 is judged the interference source whether interference source of assessment had before been pointed out, is not that control enters piece 352 if conclude.Perhaps, piece 366 enters piece 368.

At piece 368, OA﹠amp; M processor 108 is judged the previous the interference source whether interference source of appearance has disappeared, if just make control enter piece 370.Perhaps, if the interference source that occurs does not disappear, then control from piece 368 and enter 372.

At piece 370, OA﹠amp; The time started and the duration of M processor 108 storage interference sources.This category information can be stored in OA﹠amp; In M processor 108 self inside or the external memory storage 120.After executing piece 370, control enters piece 352, and at piece 372, the duration of interference source increases, and representative has the time of interference source.After having carried out piece 372, control enters piece 352.

Piece 352 is judged OA﹠amp; Whether M processor 108 receives the instruction that report and control device send, if receive, control enters 380 from piece 352.At piece 380, OA﹠amp; M processor 108 judge these instructions be to the microcontroller 106 of ANF module 100 or to OA﹠amp; M processing 108.If microcontroller 106 is given in this instruction, control enters 382 from piece 380, gives microcontroller 106 this instruction.After having carried out piece 382, main program 340 finishes.

Perhaps, if OA﹠amp; The instruction that M processor 108 is received is not the instruction to microcontroller 108, and control enters 384 from piece 380, prepares instruction is responded.Response comprises simple affirmation, or comprises the response of requested True Data.The details of piece 384 provide with Figure 17.After piece 384 has prepared response, piece 386 excitation OA﹠amp; The serial of M processor 108 is interrupted, and finishes main program 340.

Perhaps, if piece 352 concludes and do not receive instruction, control enters 390 from piece 352, and whether the by-pass switch 116 of judging Fig. 7 closure (promptly connecting bypass).If piece 390 is concluded the access failure bypass, just finish main program 340; If conclude and connected bypass, control enters 392 from piece 390.

At piece 392, OA﹠amp; M processor 108 judges whether to use the last user instruction of by-pass switch 116 bypass ANF modules 100, if having, finishes main program 340.Perhaps, if there is not the last user instruction of bypass ANF module 100, control enters 394 from piece 392, relatively bypass time and retention time.If the bypass time surpasses the retention time (for example one minute), then control from piece 394 and enter 396.

At piece 396, OA﹠amp; M processor 108 produces reports to the police, and by for example moving 24 volts of high states receiving report to the communication line of control device, this report and control device is passed in this warning.After having carried out piece 396, main program 340 finishes.

Perhaps, do not surpass the retention time if piece 394 is concluded the bypass time, control enters 398 from piece 394, successively decreases the retention time, makes the bypass time more near the retention time.At last, after piece 398 has fully reduced the retention time, piece 394 will conclude that the bypass time above the retention time, makes control enter piece 396.After executing piece 398, main program 340 finishes.

As shown in figure 17, preparation responder 384 begins to carry out at piece 400.At piece 400, OA﹠amp; M processor 108 is read microcontroller 106 information of write buffer (as memory 118 or 120), and calculates the duration of the interference source that occurs, and calculates the interference source power level, calculates average signal level.This information can be in this locality be stored in ANF module 100 or returns in real time and accuse network manager.This report can connect realization wirelessly by special circuit or through the internet.Interference source power level and average signal power can be used to assess the frequency spectrum integrality of region, to detect the fixing interference source of performance may influence the base station, also can make base station performance relevant with the interference that the base station experiences.After finishing piece 400, control enters piece 402.

At piece 402, OA﹠amp; The information that 108 pairs of pieces 400 of M processor are calculated adds real-time sign, and storage comprises the report information of the information that this real-time sign and piece 400 are calculated.This category information can be stored in OA﹠amp; In inner or its external memory storage 120 of M processor 108 self.

After executing piece 402, control enters piece 404, judges whether ANF module 100 receives instruction.This class command reception is from report and control device.If piece 404 is concluded OA﹠amp; M processor 108 is not received instruction, and control is got back to main program 340 from piece 404, continues execution block 386.

Otherwise, if piece 404 is concluded OA﹠amp; M processor 108 has been received instruction, then controls from piece 404 and enters 406, judges whether the instruction of receiving is to be used for controlling the control command that ANF module 100 is operated from far-end (such as report and control device).If piece 406 concludes that this instruction of receiving is a control command, piece 406 forwards control to piece 408, carries out this instruction specified action.Instruction for example comprises the remote activation of ANF module 100 or the instruction of forbidding, or other suitable instruction.After having carried out piece 408, control is got back to main program 340 from preparation responder 384, finishes to carry out again.

Otherwise, if piece 406 is concluded OA﹠amp; The instruction that M processor 108 is received is not a control command, then controls from piece 406 and enters 410, judges whether the instruction of receiving is execute instruction, if not piece 410 is sent control back to main program 340.Otherwise, if piece 410 concludes that this instruction of receiving is an execute instruction, then control from piece 410 and enter 412, prepare and send jamming report.This jamming report comprises that the information and the microcontroller 106 of the parameter that up-to-date 200 interference sources that ANF module 100 detects are shown write OA﹠amp; The memory 118,120 of M processor 108 visit is with the information of preparation jamming report, the broadband signal power that presents in the time of also can comprising RF level, interference source time of occurrence, the interference source duration of the frequency number (channel) that detects interference, interference source and interference source occur.

Except jamming report, OA﹠amp; M processor 108 also can prepare some different reports, and other report of this class can comprise: pattern report (operator scheme of report ANF module 100), status report (warning and the system failure of report ANF module 100), the report of software and hardware version, head report (report base station title, bandwidth carrier centre frequency, day wire size and base station section), date report, time report, activity reports (report frequency number, RF level, interference source time started, interference source duration and broad-band channel power) and final report.

Jamming report can be used for network system diagnosis, comprises determining that when network manager will measure the telephone number of the mobile unit of just attempting to get in touch or handle calling with narrow-band receiver 28.For example, report and control device can determine that mobile units are just the user of calling 911 or other emergency numbers with narrow-band receiver 28, thereby can determine and to handle this urgent call by telephone network is passed in the output of narrow-band receiver 28 with this narrow-band receiver 28.

In addition, jamming report can be used to determine when network manager should control narrow-band receiver 28, obtaining the information of relevant interference source, and gets in touch the task of handling this interference source of redistributing with its base station.For example, report and control device can be determined the attribute of interference source such as certain mobile unit for example with narrow-band receiver 28, and its way is to intercept and capture its electronic serial number (ESN) when this mobile unit is launched information on this narrow band channel.Known the attribute of interference source, report just can be with getting in touch with the infrastructure of this mobile unit communication with control device, ask its tranmitting frequency that changes this mobile unit (being the frequency of the narrow band channel launched of mobile unit) just thereon, or ask it to tell communicating by letter of weak and interference mobile unit fully.

In addition, network manager can be relevant with the information that this jamming report provides systematic function and jamming report, and this correlation can be used to measure 100 pairs of validity that increase power system capacity of ANF module.

After executing piece 412, control goes back to main program 340, continues execution block 386.

Referring now to Figure 18, OA﹠amp; M processor 108 is carried out data buffer interrupts function 500, is used for checking and indicates having valid data.Function 500 begins to check data at piece 502.

After having carried out piece 502, control enters piece 504, checks whether these data are effective.If piece 504 concludes that these data are effective, control enters 506 from piece 504, and a valid data indicators was set before end functions 500.Otherwise, if piece 504 concludes that these data are invalid, then control from piece 504 and enter 508, an invalid data designator was set before end functions 500.

After those skilled in the art has consulted above-mentioned explanation, will understand various correction of the present invention and alternate embodiment.For example, though above-mentioned explanation has specifically proposed on the 30KHz narrow band channel to eliminate this notion of interference with 1.25MHz broadband signal interference signals, but be readily understood that, this genus be applicable to bandwidth for example be 5,10 the broad-band channel of 15MHz or for example aggregate bandwidth be 5,10 or the continuous channel of 15MHz.For adapting to the bandwidth of this broad, the low-converter group can concurrent working to cover the 1.25MHz channel group.Therefore, this explanation only limits to example, does not limit the scope of the invention.CONSTRUCTED SPECIFICATION can significant change and do not deviate from spirit of the present invention, and keeps the private right of all corrections that meet the claims scope.

Claims

1. be provided with in frequency bandwidth and detect in the wideband communication signal of narrow band channel and eliminate the described a kind of method of narrow band interference, wherein the boundary belt frequency of boundary belt is characterized in that near frequency bandwidth, and this method comprises:

Scanning at least some narrow band channel to measure its signal strength signal intensity;

According to the signal strength signal intensity of described some narrow band channel at least, determine threshold value;

Scan protection band frequency is to measure the boundary belt signal strength signal intensity;

When the boundary belt signal strength signal intensity surpasses this threshold value, filtering boundary belt frequency.

2. the method for claim 1 is characterized in that, also comprises the step with penalty coefficient compensation boundary belt signal strength signal intensity.

3. method as claimed in claim 2 is characterized in that, the compensation boundary belt comprise the boundary belt signal strength signal intensity is reduced the filter of broadband receiver will be to the amount of this boundary belt signal intensity attenuation.

4. method as claimed in claim 2 is characterized in that penalty coefficient is based on the Frequency Response of filter for receiver.

5. method as claimed in claim 4 is characterized in that, filtering boundary belt frequency is included in the boundary belt signal strength signal intensity that is compensated by penalty coefficient this boundary belt frequency of filtering when exceeding threshold value.

6. the method for claim 1 is characterized in that, determines that threshold value comprises the mensuration mean value of some signal strength signal intensity at least in some narrow band channel at least.

7. method as claimed in claim 6 is characterized in that, determines that threshold value is included in the signal strength signal intensity that mensuration does not comprise some maximums at least in some narrow band channel at least during the mean value of some signal strength signal intensity.

8. method as claimed in claim 7 is characterized in that, determines that threshold value is included at least in some narrow band channel the mean value of some signal strength signal intensity is at least added offset.

9. an adaptation is provided with in frequency bandwidth and detects in the wideband communication signal of narrow band channel and eliminate the described system of narrow band interference, and wherein the boundary belt frequency of boundary belt is characterized in that near frequency bandwidth, and this system comprises:

Adapt to scanning at least some narrow band channel to measure the scanner of its signal strength signal intensity;

Adapt to receive wideband communication signal and from wherein removing narrow band interference selectively to produce the trap module of filtered wideband communication signal;

Be coupled to the controller of described scanner and trap module; wherein this controller adapt to the scanning of gated sweep device at least some narrow band channel to measure its signal strength signal intensity; determine threshold value according to described signal strength signal intensity; control described scanner scans boundary belt frequency measuring the boundary belt signal strength signal intensity, and control trap module a certain boundary belt frequency of filtering selectively when the boundary belt signal strength signal intensity exceeds this threshold value.

10. system as claimed in claim 9 is characterized in that, described controller adapts to penalty coefficient compensation boundary belt signal strength signal intensity.

11. system as claimed in claim 10 is characterized in that, described controller adaptation reduces it with the boundary belt signal strength signal intensity and will be compensated this boundary belt signal by the amount of the filter reductions of broadband receiver.

12. system as claimed in claim 10 is characterized in that, penalty coefficient is based on the Frequency Response of filter for receiver.

13. system as claimed in claim 12 is characterized in that, described controller adapts to this boundary belt frequency of filtering when the boundary belt signal strength signal intensity that is compensated by penalty coefficient surpasses this threshold value.

14. system as claimed in claim 9 is characterized in that, described controller adapts to by measuring at least in some narrow band channel at least the mean value of some signal strength signal intensity determines threshold value.

15. system as claimed in claim 9, it is characterized in that, described trap module is the first trap module, filtered wideband communication signal is the wideband communication signal of first filtering, system also comprises the second trap module, adapt to receive the first filtering wideband communication signal from the first trap module, and with the frequency of the narrow band channel that surpasses this threshold value corresponding to the signal strength signal intensity filtering first filtering wideband communication signal selectively, to produce the second filtering wideband communication signal.

16. detect and eliminate the method for narrow band interference in the wideband communication signal that narrow band channel is set in frequency bandwidth, it is characterized in that this method comprises:

Signal strength signal intensity according to described some narrow band channel is at least determined threshold value;

Identification signal intensity surpasses the narrow band channel of this threshold value;

Identification has the narrow band channel of interim interference; With

Rejection frequency is corresponding to the wideband communication signal of signal strength signal intensity above the narrow band channel of this threshold value, but not filtering is identified as the narrow band channel of interim interference.

17. method as claimed in claim 16 is characterized in that, surpasses this threshold time according to the signal strength signal intensity of narrow band channel and how long narrow band channel is identified as and has interim interference.

18. method as claimed in claim 16 is characterized in that, if the signal strength signal intensity of narrow band channel surpasses this threshold value no longer than about 20 milliseconds, just these narrow band channels has been identified as interim interference.

19. an adaptation is provided with the system that detects and eliminate narrow band interference in the wideband communication signal of narrow band channel in frequency bandwidth, it is characterized in that this system comprises:

Adapt to and receive wideband communication signal and therefrom remove the trap module of narrow band interference selectively with the wideband communication signal of generation filtering;

Be coupled to the controller of scanner and trap module, wherein this controller is fit to work with scanner, to determine threshold value according to the signal strength signal intensity of some narrow band channel at least, identification signal intensity surpasses the narrow band channel of this threshold value, identification has the narrow band channel of interim interference, and control trap module rejection frequency is corresponding to the wideband communication signal of the signal strength signal intensity that is identified above the narrow band channel of this threshold value, but not filtering has the narrow band channel of interim interference.

20. system as claimed in claim 19 is characterized in that, described controller adapts to signal strength signal intensity according to narrow band channel and surpasses this threshold time and how long narrow band channel is identified as and has interim interference.

21. system as claimed in claim 19 is characterized in that, described controller adaptation has been identified as interim interference to narrow band channel when the signal strength signal intensity of narrow band channel surpasses this threshold value no longer than about 20 milliseconds.

22. detect and eliminate the method for narrow band interference in the wideband communication signal that narrow band channel is set in frequency bandwidth, it is characterized in that this method comprises:

By represent the order that narrow band channel can noisy probability, scan at least some narrow band channel to measure its signal strength signal intensity;

Rejection frequency surpasses the wideband communication signal of the narrow band channel of this threshold value corresponding to the signal strength signal intensity of identification.

23. method as claimed in claim 22 is characterized in that, narrow band channel can noisy probability be foundation with the historical data.

24. an adaptation is provided with the system that detects and eliminate narrow band interference in the wideband communication signal of narrow band channel in frequency bandwidth, it is characterized in that this system comprises:

Adapt to by the order of represent the noisy probability of narrow band channel, scan the scanner that some narrow band channel is at least measured its signal strength signal intensity;

Be coupled to the controller of scanner and trap module, wherein this controller is fit to work with scanning, to determine threshold value according to the signal strength signal intensity of some narrow band channel at least, identification signal intensity surpasses the narrow band channel of this threshold value, and control trap module rejection frequency surpasses the wideband communication signal of the narrow band channel of this threshold value corresponding to the signal strength signal intensity of identification.

25. system as claimed in claim 24 is characterized in that, described controller adapts to according to historical data determines that narrow band channel can noisy probability.

26. detect and eliminate the method for narrow band interference in the wideband communication signal that narrow band channel is set in frequency bandwidth, it is characterized in that this method comprises:

The storage signal strength signal intensity surpasses the tabulation of the narrow band channel of this threshold value;

The tabulation identification interference source type that surpasses the narrow band channel of this threshold value according to signal strength signal intensity;

Rejection frequency is corresponding to the wideband communication signal of the signal strength signal intensity of discerning above the narrow band channel of this threshold value, and wherein the interference source type according to identification carries out this filtering.

27. the method as claim 26 is characterized in that, comprises the filter of selecting the filtering wideband communication signal according to the bandwidth of interference source.

28. method as claimed in claim 27 is characterized in that, with narrow band filter filtering narrow-band interferer.

29. method as claimed in claim 27 is characterized in that, the bandwidth of filter filtering wideband communication signal is about the bandwidth of interference source.

30. an adaptation is provided with the system that detects and eliminate narrow band interference in the wideband communication signal of narrow band channel in frequency bandwidth, it is characterized in that this system comprises:

Adapt to by the order of represent the noisy probability of narrow band channel, scan at least some narrow band channel to measure the scanner of its signal strength signal intensity;

Be coupled to the controller of scanner and trap module, wherein this controller adapts to the tabulation that the storage signal strength signal intensity surpasses the narrow band channel of threshold value, according to this tabulation identification interference source type, and control trap module rejection frequency is corresponding to the wideband communication signal of the signal strength signal intensity of discerning above the narrow band channel of this threshold value, and the filter that the trap module is used is based on the interference source type of identification.

31. system as claimed in claim 30 is characterized in that, described controller adapts to the filter of selecting the filtering wideband communication signal according to the bandwidth of interference source.

32. system as claimed in claim 31 is characterized in that, described trap module application narrow band filter filtering narrow-band interferer.

33. system as claimed in claim 31 is characterized in that, the filter bandwidht that described trap module is used is about the bandwidth of this interference source.

34. detect and eliminate the method for narrow band interference in the wideband communication signal that narrow band channel is set in frequency bandwidth, it is characterized in that this method comprises:

The narrow band channel distribution filter that the signal strength signal intensity of some identification is at least surpassed this threshold value;

Surpass the tabulation of the narrow band channel of this threshold value to the network manager output signal strength.

35. method as claimed in claim 34 is characterized in that, this tabulation is pressed the signal strength signal intensity of narrow band channel and is arranged relative importance value.

36. method as claimed in claim 34 is characterized in that, carries out this output, makes network manager can receive the information of some narrow band channel at least, and can determine to cause narrow band signal intensity to surpass the attribute of the interference source of this threshold value.

37. method as claimed in claim 36 is characterized in that, network manager is indicated by the electronics that reception is included in the interference source attribute in the narrow band interference, determines the attribute of this interference source.

38. method as claimed in claim 36 is characterized in that, the electronics indication is the electronic serial number of mobile unit.

39. method as claimed in claim 38 is characterized in that, in case identify interference source, network manager is just forbidden this interference source.

40. method as claimed in claim 34 is characterized in that, carries out this output, makes network manager can receive the information of some narrow band channel at least, and judges whether the interference source that causes narrow band signal intensity to surpass this threshold value is just attempting to send emergency service call.

41. method as claimed in claim 40 is characterized in that, network manager judges by intercepting and capturing a succession of dialed digit of certain mobile unit emission whether this interference is just trying strategy and sending emergency service call.